Four years ago, President Obama celebrated South Sudan as the world's newest nation. Today, at a meeting of the African Union, he was urging its East African neighbors to help stop that country's devastating civil war.
President Obama addresses the African Union
at its headquarters in Addis Ababa, Ethiopia, July 28, 2015
Photo courtesy of African Union
Recently, New York Times columnist Nicholas Kristof was in South Sudan. He joins us to discusses the human cost of the conflict.